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45Pagination Class
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58
59<h1>Pagination Class</h1>
60
Derek Allardcda47ee2007-04-26 21:30:35 +0000[diff] [blame]61<p>CodeIgniter's Pagination class is very easy to use, and it is 100% customizable, either dynamically or via stored preferences.</p>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]62
63<p>If you are not familiar with the term "pagination", it refers to links that allows you to navigate from page to page, like this:</p>
64
65<code><a href="#">&laquo; First</a>&nbsp;&nbsp;<a href="#">&lt;</a>&nbsp;<a href="#">1</a>&nbsp;<a href="#">2</a>&nbsp;<b>3</b>&nbsp;<a href="#">4</a>&nbsp;<a href="#">5</a>&nbsp;<a href="#">&gt;</a>&nbsp;&nbsp;<a href="#">Last &raquo;</a></code>
66
67<h2>Example</h2>
68
69<p>Here is a simple example showing how to create pagination in one of your <a href="../general/controllers.html">controller</a> functions:</p>
70
71<code>
72$this->load->library('pagination');<br /><br />
Derek Jonesff845f92008-06-26 17:05:55 +0000[diff] [blame]73$config['base_url'] = 'http://example.com/index.php/test/page/';<br />
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]74$config['total_rows'] = '200';<br />
75$config['per_page'] = '20';
76<br /><br />
77$this->pagination->initialize($config);
78
79<br /><br />
80echo $this->pagination->create_links();</code>
81
82<h3>Notes:</h3>
83
admine334c472006-10-21 19:44:22 +0000[diff] [blame]84<p>The <var>$config</var> array contains your configuration variables. It is passed to the <dfn>$this->pagination->initialize</dfn> function as shown above. Although there are some twenty items you can configure, at
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]85minimum you need the three shown. Here is a description of what those items represent:</p>
86
87<ul>
88 <li><strong>base_url</strong> This is the full URL to the controller class/function containing your pagination. In the example
admin141808a2006-08-27 01:52:51 +0000[diff] [blame]89 above, it is pointing to a controller called "Test" and a function called "page". Keep in mind that you can
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]90 <a href="../general/routing.html">re-route your URI</a> if you need a different structure.</li>
91 <li><strong>total_rows</strong> This number represents the total rows in the result set you are creating pagination for.
92 Typically this number will be the total rows that your database query returned.
93 </li>
94 <li><strong>per_page</strong> The number of items you intend to show per page. In the above example, you would be showing 20 items per page.</li>
95</ul>
96
Derek Allardc6441282007-07-04 23:54:32 +0000[diff] [blame]97<p>The <var>create_links()</var> function returns an empty string when there is no pagination to show.</p>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]98
99
100<h3>Setting preferences in a config file</h3>
101
102<p>If you prefer not to set preferences using the above method, you can instead put them into a config file.
103Simply create a new file called the <var>pagination.php</var>, add the <var>$config</var>
104array in that file. Then save the file in: <var>config/pagination.php</var> and it will be used automatically. You
105will NOT need to use the <dfn>$this->pagination->initialize</dfn> function if you save your preferences in a config file.</p>
106
107
108<h2>Customizing the Pagination</h2>
109
110<p>The following is a list of all the preferences you can pass to the initialization function to tailor the display.</p>
111
112
113<h4>$config['uri_segment'] = 3;</h4>
114
115<p>The pagination function automatically determines which segment of your URI contains the page number. If you need
116something different you can specify it.</p>
117
118<h4>$config['num_links'] = 2;</h4>
119
Derek Allard8ddc0db2008-05-21 04:54:39 +0000[diff] [blame]120<p>The number of &quot;digit&quot; links you would like before and after the selected page number. For example, the number 2
121 will place two digits on either side, as in the example links at the very top of this page.</p>
122<h4>$config['page_query_string'] = TRUE</h4>
123<p>By default, the pagination library assume you are using <a href="../general/urls.html">URI Segments</a>, and constructs your links something like</p>
Derek Jonesff845f92008-06-26 17:05:55 +0000[diff] [blame]124<p><code>http://example.com/index.php/test/page/20</code></p>
Derek Allard8ddc0db2008-05-21 04:54:39 +0000[diff] [blame]125<p>If you have $config['enable_query_strings'] set to TRUE your links will automatically be re-written using Query Strings. This option can also be explictly set. Using $config['page_query_string'] set to TRUE, the pagination link will become.</p>
Derek Jonesff845f92008-06-26 17:05:55 +0000[diff] [blame]126<p><code>http://example.com/index.php?c=test&amp;m=page&amp;per_page=20</code></p>
Derek Allardc6238e92008-05-21 05:04:26 +0000[diff] [blame]127<p>Note that &quot;per_page&quot; is the default query string passed, however can be configured using $config['query_string_segment'] = 'your_string'</p>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]128<h2>Adding Enclosing Markup</h2>
129
130<p>If you would like to surround the entire pagination with some markup you can do it with these two prefs:</p>
131
132<h4>$config['full_tag_open'] = '&lt;p>';</h4>
133<p>The opening tag placed on the left side of the entire result.</p>
134
135<h4>$config['full_tag_close'] = '&lt;/p>';</h4>
136<p>The closing tag placed on the right side of the entire result.</p>
137
138
139<h2>Customizing the First Link</h2>
140
141<h4>$config['first_link'] = 'First';</h4>
142<p>The text you would like shown in the "first" link on the left.</p>
143
144<h4>$config['first_tag_open'] = '&lt;div>';</h4>
145<p>The opening tag for the "first" link.</p>
146
Derek Allardce66d152008-03-04 20:55:55 +0000[diff] [blame]147<h4>$config['first_tag_close'] = '&lt;/div>';</h4>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]148<p>The closing tag for the "first" link.</p>
149
150<h2>Customizing the Last Link</h2>
151
152<h4>$config['last_link'] = 'Last';</h4>
153<p>The text you would like shown in the "last" link on the right.</p>
154
155<h4>$config['last_tag_open'] = '&lt;div>';</h4>
156<p>The opening tag for the "last" link.</p>
157
Derek Allardce66d152008-03-04 20:55:55 +0000[diff] [blame]158<h4>$config['last_tag_close'] = '&lt;/div>';</h4>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]159<p>The closing tag for the "last" link.</p>
160
161<h2>Customizing the "Next" Link</h2>
162
Derek Allard2d407032008-05-24 23:16:51 +0000[diff] [blame]163<h4>$config['next_link'] = '&amp;gt;';</h4>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]164<p>The text you would like shown in the "next" page link.</p>
165
166<h4>$config['next_tag_open'] = '&lt;div>';</h4>
167<p>The opening tag for the "next" link.</p>
168
Derek Allardce66d152008-03-04 20:55:55 +0000[diff] [blame]169<h4>$config['next_tag_close'] = '&lt;/div>';</h4>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]170<p>The closing tag for the "next" link.</p>
171
172<h2>Customizing the "Previous" Link</h2>
173
Derek Allard2d407032008-05-24 23:16:51 +0000[diff] [blame]174<h4>$config['prev_link'] = '&amp;lt;';</h4>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]175<p>The text you would like shown in the "previous" page link.</p>
176
177<h4>$config['prev_tag_open'] = '&lt;div>';</h4>
178<p>The opening tag for the "previous" link.</p>
179
Derek Allardce66d152008-03-04 20:55:55 +0000[diff] [blame]180<h4>$config['prev_tag_close'] = '&lt;/div>';</h4>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]181<p>The closing tag for the "previous" link.</p>
182
183<h2>Customizing the "Current Page" Link</h2>
184
185<h4>$config['cur_tag_open'] = '&lt;b>';</h4>
186<p>The opening tag for the "current" link.</p>
187
Derek Allardce66d152008-03-04 20:55:55 +0000[diff] [blame]188<h4>$config['cur_tag_close'] = '&lt;/b>';</h4>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]189<p>The closing tag for the "current" link.</p>
190
191
192<h2>Customizing the "Digit" Link</h2>
193
194<h4>$config['num_tag_open'] = '&lt;div>';</h4>
195<p>The opening tag for the "digit" link.</p>
196
Derek Allardce66d152008-03-04 20:55:55 +0000[diff] [blame]197<h4>$config['num_tag_close'] = '&lt;/div>';</h4>
adminb0dd10f2006-08-25 17:25:49 +0000[diff] [blame]198<p>The closing tag for the "digit" link.</p>
199
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